INA118:Precision, Low Power Instrumentation Amplifier

Recommended alternative parts
  • INA128 -?The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.? ?Lower broadband noise (8 nV/rtHz) and wider bandwidth (1.3 MHz)
  • INA188 -?The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.? ?Improved CMRR (118 dB) with reduced bias current (2.5 nA Max)

The INA118 is a low-power, general-purpose instrumentation amplifier offering excellent accuracy. The device’s versatile, 3-op amp design and small size make it ideal for a wide range of applications. Current-feedback input circuitry provides wide bandwidth, even at high gain (70 kHz at G = 100).

A single external resistor sets any gain from 1 to 10000. Internal input protection can withstand up to ±40 V without damage.

The INA118 is laser-trimmed for low offset voltage (50 ?V), drift (0.5 ?V/°C), and high common-mode rejection (110 dB at G = 1000). The INA118 operates with power supplies as low as ±1.35 V, and quiescent current is only 350 ?A, making the device ideal for battery-operated systems.

The INA118 is available in 8-pin plastic DIP and SO-8 surface-mount packages, specified for the –40°C to +85°C temperature range.

  • Low Offset Voltage: 50-?V Maximum
  • Low Drift: 0.5-?V/°C Maximum
  • Low Input Bias Current: 5-nA Maximum
  • High CMR: 110-dB Minimum
  • Inputs Protected to ±40 V
  • Wide Supply Range: ±1.35 to ±18 V
  • Low Quiescent Current: 350-?A
  • 8-Pin Plastic DIP, SO-8
Number of Channels (#)1
Vs (Min) (V)2.7
Vs (Max) (V)36
CMRR (Min) (dB)107
Input Offset (+/-) (Max) (uV)50
Input Offset Drift (+/-) (Max) (uV/C)0.5
Input Bias Current (+/-) (Max) (nA)5
Noise at 1kHz (Typ) (nV/rt(Hz))10
Iq (Typ) (mA)0.35
Bandwidth at Min Gain (Typ) (MHz)0.8
Gain (Min) (V/V)1
Gain (Max) (V/V)10000
Gain Error (+/-) (Max) (%)1
Operating Temperature Range (C)-40 to 85
Package GroupPDIP SOIC
Approx. Price (US$)4.80 | 1ku
Package Size: mm2:W x L (PKG)See datasheet (PDIP)
Noise at 0.1 Hz - 10 Hz (Typ) (uVpp)0.28
Gain Non-Linearity (+/-) (Max) (%)0.002
TitleTypeSize (KB)Date
INA118 Precision, Low Power Instrumentation Amplifier (Rev. A)PDF114307 Jan 2016
Application notes?(1)
TitleTypeSize (KB)Date
Getting the most out of your instrumentation amplifier designPDF17710 Oct 2005
User guides?(2)
TitleTypeSize (KB)Date
Universal Instrumentation Amplifier EVM User’s Guide (Rev. B)PDF73909 Aug 2016
Universal Instrumentation Amplifier EVM User’s GuidePDF72111 Sep 2013
Selection & solution guides?(2)
TitleTypeSize (KB)Date
Analog Signal Chain Guide (Rev. B)PDF600011 Jul 2013
TI HealthTech Fitness GuidePDF359410 Apr 2013
TitleTypeSize (KB)Date
INA118 PSpice Model (Rev. A)ZIP55?KB19 Sep 2011
INA118 TINA-TI Reference Design (Rev. B)TSC109?KB19 Sep 2011
INA118 TINA-TI Spice Model (Rev. A)ZIP5?KB11 Jun 2011
Design kits & evaluation modules?(1)
Universal Instrumentation Amplifier Evaluation ModuleINAEVMEvaluation Modules & Boards
Development tools?(2)
Calculate Input Common-Mode Range of Instrumentation AmplifiersINA-CMV-CALCCalculation Tools
SPICE-Based Analog Simulation ProgramTINA-TICircuit Design & Simulation
Ordering Information
Part #Preproduction / Production MaterialStatusTemp(oC)Price | QTYPackage | PinsDevice MarkingPackage QTY | Carrier
INA118PProductionACTIVE-40 to 855.52 | 1kuPDIP?(P)INA118P50 | TUBE
INA118PBProductionACTIVE8.17 | 1kuPDIP?(P)INA118P B50 | TUBE
INA118PBG4ProductionACTIVE8.17 | 1kuPDIP?(P)INA118P B50 | TUBE
INA118PG4ProductionACTIVE-40 to 855.52 | 1kuPDIP?(P)INA118P50 | TUBE
INA118UProductionACTIVE5.80 | 1kuSOIC?(D)INA 118U75 | TUBE
INA118U/2K5ProductionACTIVE4.80 | 1kuSOIC?(D)INA 118U2500 | LARGE T&R
INA118U/2K5G4ProductionACTIVE4.80 | 1kuSOIC?(D)INA 118U2500 | LARGE T&R
INA118UBProductionACTIVE8.45 | 1kuSOIC?(D)INA B 118U75 | TUBE
INA118UB/2K5ProductionACTIVE7.45 | 1kuSOIC?(D)INA 118U B2500 | LARGE T&R
INA118UB/2K5G4ProductionACTIVE7.45 | 1kuSOIC?(D)INA 118U B2500 | LARGE T&R
INA118UBG4ProductionACTIVE8.45 | 1kuSOIC?(D)INA 118U B75 | TUBE
INA118UG4ProductionACTIVE5.80 | 1kuSOIC?(D)INA 118U75 | TUBE
INA118 Precision, Low Power Instrumentation Amplifier INA118
所选封装材料的热学和电学性质 DCP010505B
使您的仪器放大器设计达到最佳效果 ADS8321
Universal Instrumentation Amplifier EVM User’s Guide INA118
模拟信号链路产品指南 (Rev. B) BQ24392
TI HealthTech Fitness Guide ADS1298ECGFE-PDK
INA118 PSpice Model INA118
INA118 TINA-TI Reference Design INA118
INA118 TINA-TI Spice Model INA118
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